Memoranda book dated 1801 -1802 "Book of observations" or memoranda of shipping commission accounts from 1798, including olive oil,iron,lead,tinned plate,caviar from Russia, earthenware,flax,cotton, Italian marble etc. Also notes of current prices,freight charges,currency,goods wanted and available, port dues and captains' "privileges" at various ports, including Naples, Barcelona, Leghorn,Gallipoli. Journal notes of loading and transactions on voyage carrying tar and pitch from Hull to Gibraltar or Naples for Messrs. Knox and Hay February-July 1802.

Letter Book dated 1818 -1822. Copies of business letters written from Hamburg between 1818 and 1820 to English business firms such as Thomas Richardson & Son of Hull; John Beadle & Co. of London; Swallow & Laycock of Wakefield; Ledgard & Hopkinson of Mirfield; Thomas Bell of Hull; Henry Coates of Hull; and a few German firms (usually written in English but some in German) about purchases,sales and shipping of agricultural produce such as barley,rapeseed, wheat, onions, hides.
In 1822 some letters were written from Leith, Scotland, apparently concluding some business before departure for Australia.
Note: the volume was later used in V.D.L.(Tasmania) for letters 1837-1847.

Account with Schroder & Grossmann dated November 1821 to August 1822. Small notebook: "Contra buch fur Sr. J. Leake mit Schroder & Grossmann A.1821", containing chronological entries of fairly large sums and personal names or figures.
The notebook was later used as a diary by Mrs E. Leake and some draft letters by W.B. Leake are noted in the back.

Account book dated 1820 detailing cash received and expenses, including duty, postage, carriage, wages, brokerage,
warehouse rents, "drink money" on commodities such as oil, candles, whitelead, rapeseed, oats, turmeric. Also "subscription: Freemason". Rough draft of letter, 1838, partly illegible, at front.

Account Book 1819 -1823 Includes
• Hamburg trade 1819 -Sept. 1821
Accounts of oil consigned to John Leake of Hamburg (ie.whale oil, black, brown and linseed oil). Also a few other commodities such as sewing cotton from Dacca Twist co., Manchester, redlead, 201 bags Bengal turmeric, Indian tobacco, rum.
• Stores for V.D.L. Sept. 1822
Purchases made by Leake before departure for V.D.L., including: clothing, cloth, farm implements, harness, ox harness, ploughs, carts, carpentry and joinery tools, millstones, smith's anvil, seeds of grass, clover, rye, parsley etc. for pasture, assorted garden vegetable seeds, flowers, hawthorn berries, stove, pots and pans including cast iron girdle, "tea boiler" and camp oven,candle molds,12 boxes of crown glass, drawers and bookcase, sea grass mattress, medicines, stationery, a patent brewing machine, a pair of brass barreled pistols and bullet molds.

Account Book - household &general 1814-1822 Includes:
• Mrs Leake's household expenses 1814-1820
Household &incidental family expenses such as: servants' wages, food, cakes 2d, washing, oranges, bath brick, child's knife, coals, cloak dying 3/6d, "wearing apparel or myself and children £3", "pewage at St. John's £1 .3s","by Harrison's coach for Arthur's christening"
3 Nov.1814, tape, thread and needles 1/6d, by missionary collections 3s 6d, sacramental collection 6d.
• John Leake's business and general expenses 1820 -July1822 Includes business expenses such as import of oil, "drink money" for carriers etc., and some family expenses such as Edward's schooling, Mrs Leake for housekeeping, papering a room.
• re-used in 1837 for building workers' rations